1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alexgriva [62]
3 years ago
15

Help me with 15 16 17 and 18 please thank you so much

Chemistry
2 answers:
Oksana_A [137]3 years ago
4 0
15.c
16.the law of conservation of mass state that mass in a isolated system is niether created or destroyed.
17.you can prove that dissolving salt is a physical change by evaporating the water to separate the two.
klemol [59]3 years ago
3 0
I Know 15. Answer Is D.
You might be interested in
Give six examples of complex compounds.
ra1l [238]

Answer:

Examples of complex compound include potassium ferrocyanide K4[Fe(CN)6] and potassium ferricyanide K3[Fe(CN)6]. Other examples include pentaamine chloro cobalt(III) chloride [Co(NH)5Cl]Cl2 and dichlorobis platinum(IV) nitrate [Pt(en)2Cl2](NO3)2.

3 0
3 years ago
Why burning of fuel is a chemical change give 5 reasons to support your answer
frozen [14]

Answer:

Explanation:

1. New substances such as carbondioxide and water is formed.

2. There is evolution of gas bubbles. Gases are released.

3. There is either the absorption of energy or release of energy in form of light and energy.

4. The reaction is irreversible i.e it cannot be reversed, it is permanent once the reaction take place.

5. There is a change in both odor and smell.

A chemical change is a change where new substances are formed due to changes in the properties.

6 0
3 years ago
Why water can't be burn​
mojhsa [17]

Answer:because it isnt flammable

Explanation:water can not be burned

3 0
3 years ago
Which statement is most consistent with the plum pudding model of the atom?
lianna [129]
The answer to this question would be: <span>1) Electrons occupy regions of space
</span><span>
In plum pudding model, the atoms are drawn as pudding and the negative particle is spread around the pudding. In this model, the electron is spread but not moving in orbit. Rutherford model that comes afterward is the one that says most of the atoms is empty space.</span>
3 0
3 years ago
Read 2 more answers
¿que se necesita para escribir un informe de experimento? Plis ​
Ludmilka [50]

Answer:

Explanation:

Introducción. Dentro de la introducción, el investigador limita el estudio. Muestra los datos generales importantes y...

Hipótesis. La hipótesis consiste en una apreciación que el investigador hace en torno al problema. Se define como una...

Objetivos. Los objetivos de un estudio son los movimientos que se deben hacer para solucionar el

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is a valid pair representing STP?
    13·1 answer
  • This reaction is an explosive reaction of a strong acid combining with a strong base.
    7·2 answers
  • This is the chemical formula for nickel tetracarbonyl (a powerfully poisonous liquid used in nickel refining):nico4a chemical en
    13·1 answer
  • As a chemical reaction occurs, the thermometer in the container records an increase in temperature. What is true of the reaction
    9·2 answers
  • The last time the atmospheric carbon dioxide level was as high as it is today was _________ years ago.
    13·1 answer
  • which type of bonding involves sharing valence electrons, but the valence electrons aren't confined to a specific region between
    11·1 answer
  • Houses and other buildings use circuits that are wired in<br> ____________ ?
    12·1 answer
  • How can people conserve water at home?
    12·2 answers
  • Am i right??<br><br>if i'm not pls correct me if i am tell me too
    7·2 answers
  • Pls help with my fianals​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!